Kodi 18 - 'cannot save setting' for backup location on usb

[jakenl]

At the end I got it working.

In the GUI I didn't see the updates that I was looking for. Only a whole bunch of PHP7.3 (that I need to run a webpage) updates. In xbian-config on the commandline I found the ones that we were looking for.

After a reboot, a black screen, not even a cursor blinking.
I flashed yesterdays image on the stick from the other USB stick, but that didn't boot either.
Than I checked the cmdline.txt from the SD-card, it gave a root=dev/sda1, while I was pretty sure I renamed it to root=LABEL=xbian-copy
Changing it to the default SD-card location made it boot from the SD-card altogether.
With lsblk I figured out what drive indication the OS-USB stick was: /dev/sda1 for xbian-boot and /dev/sda2 for xbian-copy (both generated by the available option in xbian-config to make a copy from SD-card to USB.
Only when I updated the cmdline.txt to root=/dev/sda2 my system booted again. Very weird, since I would say that A: shouldn't it boot from the /dev/sda1? B: /dev/sda2 should be equal to LABEL=xbian-copy (which I thought to be more robust than a possible changing designation of drive letter or changing UUID when I replace the OS-USB stick.

Anyway, handling backup through the GUI works fine now. I was glad that 'behind the screens' it worked already before, since I could use it today. Although, at the end I changed on the SD-card the cmdline.txt, which was saved last on March 4th, therefore not changed by the updates. Very strange that I had to modify from /dev/sda1 to /dev/sda2.